Headrest guide sleeve for vehicle

Abstract

The utility model relates to the technical field of automobile manufacturing, in particular to a headrest guide sleeve for an automobile. In order to solve the problem that a headrest framework is difficult to insert and pull or freely slides off when an automobile headrest is disassembled and assembled, the utility model provides an automobile headrest guide sleeve which comprises a guide pipe, a guide convex rib is arranged on the inner wall of the guide pipe, and the guide convex rib extends along the axial direction of the guide pipe. Therefore, when the headrest framework is inserted into the guide pipe in the automotive headrest guide sleeve, the headrest framework can be inserted and guided through the guide convex ribs, the friction force between the inner wall of the guide pipe and the headrest framework is increased through the guide convex ribs, and the problem that the headrest framework freely slides off in the insertion process is avoided. And the stability of the insertion and extraction force between the headrest framework and the guide pipe can be ensured, and the problem that the headrest framework is difficult to insert and extract is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile manufacturing, in particular to a vehicle headrest guide sleeve. Background Art

[0002] With the continuous development of the automobile industry, consumers' requirements for the quality of automobiles are getting higher and higher. When a vehicle headrest is installed on a seat, the headrest skeleton is usually inserted into a guide tube in a headrest guide sleeve fixedly installed on the seat backrest, and the headrest skeleton and the guide tube are connected by interference fit. The existing guide tube in the headrest guide sleeve is an injection-molded plastic part, and it is easy to lose its roundness due to shrinkage deformation during the injection molding process, resulting in the inability to guarantee the concentricity of the guide tube, and further resulting in problems such as difficult insertion and extraction of the headrest skeleton or free slipping during the disassembly and assembly of the headrest, affecting the use performance of the headrest. Summary of the Utility Model

[0003] In order to solve the problems of difficult insertion and extraction of the headrest skeleton or free slipping during the disassembly and assembly of the vehicle headrest, the utility model provides a vehicle headrest guide sleeve, which includes a guide tube. Guide ribs are arranged on the inner wall of the guide tube, and the guide ribs extend along the axial direction of the guide tube. In this way, when the headrest skeleton is inserted into the guide tube of the vehicle headrest guide sleeve of the utility model, the guide ribs can be used to guide the insertion of the headrest skeleton, and the guide ribs can be used to increase the friction force between the inner wall of the guide tube and the headrest skeleton, avoid the problem of free slipping of the headrest skeleton during the insertion process, and ensure the stability of the insertion and extraction force between the headrest skeleton and the guide tube, avoiding the problem of difficult insertion and extraction of the headrest skeleton.

[0004] Preferably, multiple groups of guide rib groups are arranged on the inner wall of the guide tube, and each guide rib group includes at least two guide ribs. In this way, multiple groups of guide rib groups are arranged on the inner wall of the guide tube to cooperate with multiple groups of guide rib groups to guide the headrest skeleton and increase the friction force during the disassembly and assembly of the headrest, thereby improving the stability of the insertion and extraction force between the headrest skeleton and the guide tube.

[0005] Furthermore, the guide ribs are evenly distributed in the circumferential direction. In this way, during the disassembly and assembly of the headrest, the force on the headrest skeleton can be made uniform, avoiding the headrest skeleton from shaking and tilting due to uneven force during the insertion and extraction process, affecting the disassembly and assembly of the headrest.

[0006] Preferably, the bottom width w of the guiding rib has a value range of [0.7 mm, 0.9 mm], and the top height h of the guiding rib has a value range of [0.2 mm, 0.4 mm]. Further, the bottom width w of the guiding rib is 0.8 mm, and the top height h of the guiding rib is 0.3 mm. For such a guiding rib, compared with the guiding tube, it has a smaller size. During the injection molding process of the guiding tube, the deformation amount caused by shrinkage of the guiding rib is smaller, and it is easier to repair the mold, so that it is easy to ensure that the precision of the fitting clearance between the headrest skeleton and the guiding tube is within 0.1 mm.

[0007] Preferably, a locking tongue is provided on the tube wall of the guiding tube, and a protruding tongue is provided on the outer wall of the locking tongue facing the movable end of the engaging disc. In this way, when installing the vehicle headrest guide sleeve of the present invention on the seat backrest, the vehicle headrest guide sleeve of the present invention can be clamped and fixed by using the cooperation between the locking tongue and the seat backrest, and the installation is simple and convenient. Further, at least two locking tongues are provided on the tube wall of the guiding tube, and the locking tongues are evenly distributed in the circumferential direction. In this way, providing at least two locking tongues on the tube wall of the guiding tube can not only improve the stability when the vehicle headrest guide sleeve of the present invention is installed on the seat backrest, but also ensure that the vehicle headrest guide sleeve is stressed evenly when disassembling and assembling the headrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic structural diagram of the vehicle headrest guide sleeve of the present invention;

[0009] Figure 2 is Figure 1 the A-A cross-sectional structural schematic diagram in

[0010] Figure 3 is Figure 1 the enlarged main view of the B-B cross-section in

[0011] Figure 4 is Figure 3 the enlarged schematic diagram of Q in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] Next, in combination with Figures 1 to 4 , the vehicle headrest guide sleeve of the present invention will be described in detail.

[0013] As shown in Figures 1 to 4As shown in the figure, the headrest guide sleeve for a vehicle of the present utility model includes a guide tube 1, on the inner wall of which there are provided guide ribs 11 that extend along the axial direction of the guide tube 1. In this way, when inserting a headrest skeleton (not shown in the figure) into the guide tube 1 of the headrest guide sleeve for a vehicle of the present utility model, the guide ribs 11 can be used to guide the insertion of the headrest skeleton, and the guide ribs 11 are used to increase the friction force between the inner wall of the guide tube 1 and the headrest skeleton, avoiding the problem of free slipping of the headrest skeleton during the insertion process, and ensuring the stability of the insertion and extraction force between the headrest skeleton and the guide tube 1, and avoiding the problem of difficult insertion and extraction of the headrest skeleton. Preferably, multiple groups of guide rib groups (not shown in the figure) are provided on the inner wall of the guide tube 1, and each guide rib group includes at least two guide ribs 11. In this way, by providing multiple groups of guide rib groups on the inner wall of the guide tube 1, the multiple groups of guide rib groups can be used in cooperation to guide the headrest skeleton and increase the friction force when disassembling and assembling the headrest, thereby improving the stability of the insertion and extraction force between the headrest skeleton and the guide tube 1, and ensuring that the insertion force of the headrest skeleton is less than 60 N and the extraction force is less than 120 N. Preferably, the guide ribs 11 are evenly distributed in the circumferential direction. In this way, when disassembling and assembling the headrest, the force on the headrest skeleton can be made uniform, avoiding the headrest skeleton from shaking and tilting due to uneven force during the insertion and extraction process, which affects the disassembly and assembly of the headrest. Preferably, the bottom width w of the guide rib 11 has a value range of [0.7 mm, 0.9 mm], and the top height h of the guide rib 11 has a value range of [0.2 mm, 0.4 mm]. Preferably, the bottom width w of the guide rib 11 is 0.8 mm, and the top height h of the guide rib 11 is 0.3 mm. Such guide ribs 11 are relatively small in size compared to the guide tube 1 with an inner diameter of 14 mm. During the injection molding process of the guide tube 1, the deformation amount of the guide ribs 11 due to shrinkage is small, and it is easier to repair the mold, so that it is easy to ensure that the precision of the fit clearance between the headrest skeleton and the guide tube 1 is within 0.1 mm. Preferably, a locking tongue 12 is provided on the tube wall of the guide tube 1, and a protruding tongue 121 is provided on the outer wall of the locking tongue 12 facing the movable end of the clamping disc 2. In this way, when installing the headrest guide sleeve for a vehicle of the present utility model on the seat backrest, the locking tongue 12 can be used to cooperate with the seat backrest to clamp and fix the headrest guide sleeve for a vehicle of the present utility model, and the installation is simple and convenient. Preferably, at least two locking tongues 12 are provided on the tube wall of the guide tube 1, and the locking tongues 12 are evenly distributed in the circumferential direction. In this way, by providing at least two locking tongues 12 on the tube wall of the guide tube 1, it can not only improve the stability when the headrest guide sleeve for a vehicle of the present utility model is installed on the seat backrest, but also ensure that the headrest guide sleeve for a vehicle of the present utility model is evenly stressed when disassembling and assembling the headrest.

Claims

1. A headrest guide sleeve for a vehicle, characterized in that: The vehicle headrest guide sleeve comprises a guide tube, the inner wall of which is provided with guide convex ribs, and the guide convex ribs extend along the axial direction of the guide tube.

2. The vehicle headrest guide sleeve according to claim 1, characterized in that: A plurality of guide rib groups are arranged on the inner wall of the guide tube, and the guide rib group includes at least two guide convex ribs.

3. The vehicle headrest guide sleeve according to claim 2, characterized in that: The guide ribs are evenly distributed in the circumferential direction.

4. The vehicle headrest guide sleeve according to any one of claims 1 to 3, characterized in that: The bottom width w of the guide rib is in the range of [0.7 mm, 0.9 mm], and the top height h of the guide rib is in the range of [0.2 mm, 0.4 mm].

5. The vehicle headrest guide sleeve according to claim 4, characterized in that: The bottom width w of the guide rib is 0.8 mm, and the top height h of the guide rib is 0.3 mm.

6. The vehicle headrest guide sleeve according to any one of claims 1 to 3, characterized in that: A clamping tongue is arranged on the tube wall of the guide tube, and a protruding tongue is arranged on the outer wall of the movable end of the clamping tongue facing the clamping disc.

7. The vehicle headrest guide sleeve according to claim 6, characterized in that: At least two of the latching tongues are arranged on the tube wall of the guide tube, and the latching tongues are evenly distributed in the circumferential direction.

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